Combining n-MOS Charge Sensing with p-MOS Silicon Hole Double Quantum Dots in a CMOS platform

Bibliographic Details
Title: Combining n-MOS Charge Sensing with p-MOS Silicon Hole Double Quantum Dots in a CMOS platform
Authors: Jin, Ik Kyeong, Kumar, Krittika, Rendell, Matthew J., Huang, Jonathan Y., Escott, Chris C., Hudson, Fay E., Lim, Wee Han, Dzurak, Andrew S., Hamilton, Alexander R., Liles, Scott D.
Source: Nano Lett. 2023, 23, 4, 1261-1266
Publication Year: 2022
Collection: Condensed Matter
Subject Terms: Condensed Matter - Mesoscale and Nanoscale Physics
More Details: Holes in silicon quantum dots are receiving significant attention due to their potential as fast, tunable, and scalable qubits in semiconductor quantum circuits. Despite this, challenges remain in this material system including difficulties using charge sensing to determine the number of holes in a quantum dot, and in controlling the coupling between adjacent quantum dots. In this work, we address these problems by fabricating an ambipolar complementary metal-oxide-semiconductor (CMOS) device using multilayer palladium gates. The device consists of an electron charge sensor adjacent to a hole double quantum dot. We demonstrate control of the spin state via electric dipole spin resonance (EDSR). We achieve smooth control of the inter-dot coupling rate over two orders of magnitude and use the charge sensor to perform spin-to-charge conversion to measure the hole singlet-triplet relaxation time of 11 {\mu}s for a known hole occupation. These results provide a path towards improving the quality and controllability of hole spin-qubits.
Document Type: Working Paper
DOI: 10.1021/acs.nanolett.2c04417
Access URL: http://arxiv.org/abs/2211.00178
Accession Number: edsarx.2211.00178
Database: arXiv
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  Data: Combining n-MOS Charge Sensing with p-MOS Silicon Hole Double Quantum Dots in a CMOS platform
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  Data: <searchLink fieldCode="AR" term="%22Jin%2C+Ik+Kyeong%22">Jin, Ik Kyeong</searchLink><br /><searchLink fieldCode="AR" term="%22Kumar%2C+Krittika%22">Kumar, Krittika</searchLink><br /><searchLink fieldCode="AR" term="%22Rendell%2C+Matthew+J%2E%22">Rendell, Matthew J.</searchLink><br /><searchLink fieldCode="AR" term="%22Huang%2C+Jonathan+Y%2E%22">Huang, Jonathan Y.</searchLink><br /><searchLink fieldCode="AR" term="%22Escott%2C+Chris+C%2E%22">Escott, Chris C.</searchLink><br /><searchLink fieldCode="AR" term="%22Hudson%2C+Fay+E%2E%22">Hudson, Fay E.</searchLink><br /><searchLink fieldCode="AR" term="%22Lim%2C+Wee+Han%22">Lim, Wee Han</searchLink><br /><searchLink fieldCode="AR" term="%22Dzurak%2C+Andrew+S%2E%22">Dzurak, Andrew S.</searchLink><br /><searchLink fieldCode="AR" term="%22Hamilton%2C+Alexander+R%2E%22">Hamilton, Alexander R.</searchLink><br /><searchLink fieldCode="AR" term="%22Liles%2C+Scott+D%2E%22">Liles, Scott D.</searchLink>
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  Data: Nano Lett. 2023, 23, 4, 1261-1266
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  Data: Holes in silicon quantum dots are receiving significant attention due to their potential as fast, tunable, and scalable qubits in semiconductor quantum circuits. Despite this, challenges remain in this material system including difficulties using charge sensing to determine the number of holes in a quantum dot, and in controlling the coupling between adjacent quantum dots. In this work, we address these problems by fabricating an ambipolar complementary metal-oxide-semiconductor (CMOS) device using multilayer palladium gates. The device consists of an electron charge sensor adjacent to a hole double quantum dot. We demonstrate control of the spin state via electric dipole spin resonance (EDSR). We achieve smooth control of the inter-dot coupling rate over two orders of magnitude and use the charge sensor to perform spin-to-charge conversion to measure the hole singlet-triplet relaxation time of 11 {\mu}s for a known hole occupation. These results provide a path towards improving the quality and controllability of hole spin-qubits.
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